1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * Copyright 2008-2010 Cisco Systems, Inc. All rights reserved.
4 * Copyright 2007 Nuova Systems, Inc. All rights reserved.
5 */
6
7#include <linux/kernel.h>
8#include <linux/errno.h>
9#include <linux/types.h>
10#include <linux/pci.h>
11#include <linux/delay.h>
12
13#include "vnic_dev.h"
14#include "vnic_intr.h"
15#include "enic.h"
16
17void vnic_intr_free(struct vnic_intr *intr)
18{
19 intr->ctrl = NULL;
20}
21
22int vnic_intr_alloc(struct vnic_dev *vdev, struct vnic_intr *intr,
23 unsigned int index)
24{
25 intr->index = index;
26 intr->vdev = vdev;
27
28 intr->ctrl = vnic_dev_get_res(vdev, type: RES_TYPE_INTR_CTRL, index);
29 if (!intr->ctrl) {
30 vdev_err(vdev, "Failed to hook INTR[%d].ctrl resource\n",
31 index);
32 return -EINVAL;
33 }
34
35 return 0;
36}
37
38void vnic_intr_init(struct vnic_intr *intr, u32 coalescing_timer,
39 unsigned int coalescing_type, unsigned int mask_on_assertion)
40{
41 vnic_intr_coalescing_timer_set(intr, coalescing_timer);
42 iowrite32(coalescing_type, &intr->ctrl->coalescing_type);
43 iowrite32(mask_on_assertion, &intr->ctrl->mask_on_assertion);
44 iowrite32(0, &intr->ctrl->int_credits);
45}
46
47void vnic_intr_coalescing_timer_set(struct vnic_intr *intr,
48 u32 coalescing_timer)
49{
50 iowrite32(vnic_dev_intr_coal_timer_usec_to_hw(vdev: intr->vdev,
51 usec: coalescing_timer), &intr->ctrl->coalescing_timer);
52}
53
54void vnic_intr_clean(struct vnic_intr *intr)
55{
56 iowrite32(0, &intr->ctrl->int_credits);
57}
58

source code of linux/drivers/net/ethernet/cisco/enic/vnic_intr.c